International Conference on Exotic Atoms and Related Topics - EXA2014

Since the first trapped antihydrogen in 2010 [1] and observing its long lifetime in the 0.5 K deep neutral atom trap [2], experiments have been performed on the anti-atom resulting in the observation of resonant transitions between the hyperfine states of the ground state [3], experimental limits on the ratio of the gravitational mass to the inertial mass of antimatter and an experimental limit on the charge of antihydrogen [5]. We will give an overview of the ALPHA experiment [6] and present some the results originating from recent experiments on trapped antihydrogen. Furthermore, a outline of a newly proposed antimatter gravity experiment will be given [7]. References [1] G. B. Andresen et al. (ALPHA collaboration), Nature 468, 673 (2010). [2] G. B. Andresen et al. (ALPHA collaboration), Nature Phys. 7, 558 (2011). [3] C. Amole et al. (ALPHA collaboration), Nature 483, 439 (2012). [4] C. Amole et al. (ALPHA collaboration), Nature Communications 4, 1785 (2013). [5] C. Amole et al. (ALPHA collaboration), Nature Communications 5, 3955 (2014). [6] C. Amole et al. (ALPHA collaboration), Nucl. Instr. and Meth. in Phys. Res. A 735 (2014) 319 [7] P. Hamilton et al., Phys. Rev. Lett. 112, 121102 (2014). *ALPHA collaboration http://alpha.web.cern.ch; C. Amole, M.D. Ashkezari, M. Baquero-Ruiz, W. Bertsche, P.D. Bowe, E. Butler, A. Capra, C.L. Cesar, M. Charlton, A. Deller, P.H. Donnan, S. Eriksson, J. Fajans, T. Friesen, M.C. Fujiwara, D.R. Gill, A. Gutierrez, J.S. Hangst, W.N. Hardy, M.E. Hayden, A.J. Humphries, C.A. Isaac, S. Jonsell, L. Kurchaninov, A. Little, N. Madsen, J.T.K. McKenna, S. Menary, S.C. Napoli, P. Nolan, K. Olchanski, A. Olin, P. Pusa, C. Ø. Rasmussen, F. Robicheaux, E. Sarid, C. R. Shields, D.M. Silveira, S. Stracka, C. So, R.I. Thompson, D.P. van der Werf, J.S. Wurtele.